[Beowulf] EM64T Clusters

[Tim Small]

Greg Lindahl wrote:

>It's definitely an _interesting_ process -- we can't get ours to boot,
>and we can't get a PCI Express video card to try to diagnose it.
>That's something you can't buy at Fry's.
>
>As far as compilers, the AMD64 version of gcc only needs one tweak to
>avoid the instruction that Intel screwed up.
>  
>
There was a note regarding DMA, and the lack of an IOMMU on the EM64T 
machines - something else that Intel changed vs. AMD64 - on LWN a couple 
of weeks ago.  Mmm, a big chunk of RAM reserved at boot time for bounce 
buffers....  Nice design.

http://lwn.net/Articles/90958/

Tim.